CVE-2021-26539

MediumCVSS 5.3/10Last modified Jun 17, 2026

Description

Apostrophe Technologies sanitize-html before 2.3.1 does not properly handle internationalized domain name (IDN) which could allow an attacker to bypass hostname whitelist validation set by the "allowedIframeHostnames" option.

Metrics

CVSS 3.1 5.3/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Affected software

No affected versions have been published.

Timeline

Published: Feb 8, 2021
Last modified: Jun 17, 2026
NVD status: Modified

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